mesh: Fix channel switch error during CAC

Mesh interface would have used its channel parameters that were
configured during initialization even after channel switch due to DFS
radar detection during CAC which could result in a channel switch error.
Fix the error by updating the channel parameters when channel has been
changed from the initial one.

Signed-off-by: Peter Oh <peter.oh@bowerswilkins.com>

diff --git a/wpa_supplicant/mesh.c b/wpa_supplicant/mesh.c
index b8fafa5dba8827ae2153f26a28b4423361d17ba9..ab816b9c987ab712536fd5346ef701c76a733be3 100644 (file)
--- a/wpa_supplicant/mesh.c
+++ b/wpa_supplicant/mesh.c
@@ -13,6 +13,7 @@
 #include "utils/uuid.h"
 #include "common/ieee802_11_defs.h"
 #include "common/wpa_ctrl.h"
+#include "common/hw_features_common.h"
 #include "ap/sta_info.h"
 #include "ap/hostapd.h"
 #include "ap/ieee802_11.h"
@@ -207,6 +208,43 @@ static int wpas_mesh_complete(struct wpa_supplicant *wpa_s)
                return -1;
        }
 
+       /*
+        * Update channel configuration if the channel has changed since the
+        * initial setting, i.e., due to DFS radar detection during CAC.
+        */
+       if (ifmsh->freq != params->freq.freq) {
+               struct he_capabilities *he_capab = NULL;
+
+               wpa_s->assoc_freq = ifmsh->freq;
+               ssid->frequency = ifmsh->freq;
+
+               if (ifmsh->current_mode)
+                       he_capab = &ifmsh->current_mode->he_capab[
+                               IEEE80211_MODE_MESH];
+
+               if (hostapd_set_freq_params(
+                           &params->freq,
+                           ifmsh->conf->hw_mode,
+                           ifmsh->freq,
+                           ifmsh->conf->channel,
+                           ifmsh->conf->enable_edmg,
+                           ifmsh->conf->edmg_channel,
+                           ifmsh->conf->ieee80211n,
+                           ifmsh->conf->ieee80211ac,
+                           ifmsh->conf->ieee80211ax,
+                           ifmsh->conf->secondary_channel,
+                           hostapd_get_oper_chwidth(ifmsh->conf),
+                           hostapd_get_oper_centr_freq_seg0_idx(ifmsh->conf),
+                           hostapd_get_oper_centr_freq_seg1_idx(ifmsh->conf),
+                           ifmsh->conf->vht_capab,
+                           he_capab)) {
+                       wpa_printf(MSG_ERROR,
+                                  "Error updating mesh frequency params");
+                       wpa_supplicant_mesh_deinit(wpa_s);
+                       return -1;
+               }
+       }
+
        if (ifmsh->mconf->security != MESH_CONF_SEC_NONE &&
            wpas_mesh_init_rsn(wpa_s)) {
                wpa_printf(MSG_ERROR,